A multitude of jailbreak tools are available to jailbreak your iPod Touch, iPhone, iPad and  Apple TV. This includes Redsn0w 0.9.6, PwnageTool 4.1, sn0wbreeze 2.1, greenpois0n RC4 and limera1n. Below the jailbreak tools are ranked according to their popularity levels.

Limera1n is a jailbreak tool created by Geohot, and it was the very first jailbreak tool to jailbreak the iOS 4.1 firmware. Limera1n was actually released to make the Chronic-Dev Team save the SHAtter exploit for later iDevices. Follow the jailbreak tutorial here.

Jailbreak Me is the simplest jailbreak ever. Not only it is pure eye candy, but also very easy to use. Due to the efforts of the Dev Team jailbreaking your iPhone 4 and any other iDevices  with Jailbreak Me is as simple as visiting a website. It can jailbreak your iPhone 4 or any other iDevice running the iOS 4 or iOS 4.0.1 firmware. Follow the jailbreak tutorial here.

Greenpois0n jailbreak tool was created by the Chronic Dev Team and it was the second jailbreak tools to jailbreak the iOS 4.1 firmware. Greenpois0n is a one click jailbreak tool; meaning that all you need to do to jailbreak your iDevice is click a button. Follow the jailbreak tutorial here.

Redsn0w (originally named QuickPwn) was re-released during the times of the 2xx firmware generations, as one of the first jailbreak tools to jailbreak the iPod Touch 2G. Developed by the iPhone Dev-Team, Redsn0w has become one of the most used jailbreak tools to jailbreak the iOS firmware. Follow the jailbreak tutorial here.

PwnageTool is a MAC only jailbreak tool that jailbreaks your iDevice by creating a custom cooked IPSW (Apple’s Firmware File). Once this IPSW is created you must restore it to your iDevice through iTunes. Follow the jailbreak tutorial here.